Last week we reported that an important part of Captain America's get-up appeared on Tony Stark's workbench in Iron Man. Now it seems as if the new The Incredible Hulk movie gives us our first look at the secrets of the military mad science that created the Captain in the first place. Minor spoilers, plus a gallery of new images, including one where Betty Ross is wearing a white shirt in the rain, after the jump.

Apparently the green concoction in the background of one of these images is the "super-soldier serum" developed during World War II. It's shown to Emil Blonsky (Tim Roth) when he prepares to take the shot that turns him into the Abomination, the Hulk's sparring partner. And that's the serum that turned Steve Rogers, a weakling volunteer, into the fighting machine, Captain America. [Latino Review]